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Adenine-Induced Nephropathy Reduces Atherosclerosis in <i>ApoE</i> Knockout Mice
oleh: Laeticia Scherler, Sofia N. Verouti, Daniel Ackermann, Bruno Vogt, Geneviève Escher
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-08-01 |
Deskripsi
Background: Cardiovascular events are the main cause of death in patients with chronic kidney disease. We hypothesize that the protective effects of renal cholesterol and vitamin D<sub>3</sub> metabolism are lost under this condition. Nephropathy was induced by adenine in Apolipoprotein E knockout mice. The atherosclerotic phenotype was compared to mice with normal renal function. Methods: Mice were fed a western diet ±0.15% adenine. Urine and feces were collected to assess renal function and fecal output. Atherosclerosis, serum lipoprotein composition and functionality, hepatic lipids, and expression of genes involved in lipid metabolism, vitamin D<sub>3</sub> and Na<sup>+</sup> homeostasis, were assessed. Bones were analyzed by microCT. Results: Mice fed with adenine showed enhanced urinary Na<sup>+</sup>, Ca<sup>2+</sup>, and Pi excretion, reduced urinary pH, Urea<sub>Urine</sub>/Urea<sub>Serum</sub>, and Creatinine<sub>Urine</sub>/Creatinine<sub>Serum</sub> ratios. They developed less atherosclerosis. Lipoproteins in serum and hepatic lipids remained unchanged. Cholesterol efflux increased. Fecal output of cholesteryl ester and triglycerides increased. In the liver, mRNA levels of <i>Cyp27a1</i>, <i>Cyp7a1</i>, and <i>Scarb1</i> increased; in the kidneys, <i>Slc9a3</i>, <i>Slc12a3, Vdr</i>, and <i>Cyp24a1</i> decreased. Adenine increased cholesterol efflux in vitro. Tibias were shorter. Conclusion: Adenine induced tubular damage and was athero-protective because of enhanced cholesterol efflux and lipids elimination in feces. Bone growth was also affected.